I bought my 2004 GS with 14,000 miles on it. The finish is impressive. No corrosion on any of the aluminum bits or painted metal parts (wheels, motor, frame) and the bodywork's paint is still in excellent condition. I've owned a few Suzukis (three Bandits, Burgman 650) and have to say that I wasn't too impressed with the finish on any of them, especially the paint, which seemed thin and easy to scratch.
2014 350 EXC-F
2006 Djebel 250XC